Improvement in extension-locks for doors



yJ. MOORE'. Extension-Look for Doors.

No'l 204,070.

Patented IVlay 21, A1878.

W////////////Il///////////// N.PETERS. FHOTQ LITNOGRAPHEH ASHIN 0M n C4UnrTEn STATES PATENT OEEroE.

JOHN MOORE, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN EXTENSION-LOCKS FOR DOORS.

Specification forming part of Letters Patent No. 204,070, dated May 21,187.8; application led February 2,1878.

To all whom it may concern: j

Be it known that l, JOHN MOORE, of Brooklyn, New York, have inventedcertain lmprovements in Extension-Locks for Doors, of which thefollowing is a specification:

My improvements relate to that class of locks in which thetumbler-chamber, containing the key-hole and the stem which is rotatedby the key to operate the bolt of the lock, is made capable ofadjustment to adapt the lock for use on doors of variable thickness; andmy invention relates to the construction of the rotating stem, both withreference to the sliding tumblers which are operated by the key and withreference to the method in which the rotating stem is made capable yoflongitudinal movement and fixed adjustment.

In the accompanying drawings', which represent my invention applied toan ordinaryT rimlock, Figure lis a central longitudinal section of thelock, showing the key inserted in the proper position to rotate the stemwhich operates the bolt. Fig. 2 is a transverse sect-ion through theline x x on Fig. 1. Fig. 3 is a transverse section of the tumblerchamber through'the line y y on Fig. 1. Fig'.4 is anisometricalperspective of the rotating stem, showing the crooked upper end of thestem provided with longitudinal slots to admit the wardsof the tumblerswhen the key is not inserted, and also showing the semi-cylindricalshape of the lower part of the stem and the longitudinal tongue on theflat face ofthe stem, which engages a groove in a correspondingsemi-cylindrical piece which is contained 1n the bearing in which thestem rotates. Fig. 5 is a transverse section of the stem bearing throughthe line z z on Fig. l.

On reference to the drawings it will be seen that the tumbler-chamber isa rectangular recess in the cylinder A, which contains a series of loosetumblers, a, placed one upon the other, and adapted to slide back andforth, when operated upon by the key B, or by their gravity, in eitherdirection, or by the action of the flat spring al on one side of thetumbler-chamber. The upper en'd c of the rotating stem C, which operatesthe cam-shaft I, and consequently the bolt, projects through the base ofthe tumbler-chamber, and occupies a central position therein in properrelation to the hole in the face of the cylinder A, through which thekey B is inserted. The tumblers a are perforated plates of thin sheetmetal, and are each provided with the inwardly-projecting tongues orwards a?, one or the other of which, when the key is not inserted, dropsinto one ofthe longitudinalrecesses c in the upper end ofthe stem C, andhence prevents the turning of the stem. The cylinder Ais prevented fromturning by reason of being secured to the steadying-plate D, whichextends inwardly, and is also secured to one side of the box E, in whichthe stem C has its principal bearing. The steadying-plate D is providedwith the slots d for the almission of the screws df, by which it isfastened to the cylinder A and the box E, respectively, the object oftheslots being to allow the fastening of the chamber A at variabledistances from the box'E. I

Instead of the steadying-pla'te D, pins may be inserted in holes drilledthrough the cylinder A and into the box E. Such pins may be held byset-screws corresponding to the screws d. As the Ycylinder A is amplysupported upon the substantial stem O, the principal function of thesteadying-plate or pin is to prevent the cylinder from turning.

It will be seen that the edges of the key conform to the shape ,of theedges of the slot c' in the crooked upper portion c of the rotatingstem, and hence when the key is inserted the wards of the tuinblers a2are thrown out of the slots c', and the stem O can then be turned bypower applied to the key. The principal bearing e ofthe rotating stem iscontained in the box E, and it will be seen that this bearing is filledwith a shaft composed of ltwo parts, one of which is contributed by thelower portion of the stem G and the other by the correspondingsemi-cylindrical piece F, which is 'provided with the recess f in itsperiphery for the reception of the edges of the stop-plates fl and f2,which are respectively screwed to the opposite sides of the box E, andserve to prevent any longitudinal movement of the piece F. The piece Fis provided with the longitudinal groove Gto receive and engage thetongue on the sliding stem G. At its lower end the piece F is alsoprovided with the projecting half-collar H, which bears upon the innerface of the box E, and which answers the purpose of a crank to rotatethe hollow cam-shaft I, which operates the bolt of the lock. Theconnection of the cam-shaft I with the crank His effected by means ofthe tongue fi, which projects into the groove i' in the face of theprojecting halfc01lar H. The cam-shaft is made hollow to allow thelongitudinal movement of the sliding stem O. The curved periphery of thesliding stem O is provided with a series of grooves, la, which arerepresented as being about a quarter of an inch apart, and whichcorrespond to the groove f in the stationary piece F in respect toengaging the edges of the stop-plates f1 and f2, by means of which thelongitudinal movement of the stem O is prevented.

It will, of course, be understood that the crank H may be connected withthe cam-shaft in any convenient way-as, for example, by pins projectinginto acollar on the cam-shaft, if desired.

IVhen it is desired to vary the distance to which the chamber A projectsfrom the lock, the stop-plate f2 is removed by loosening the screw K,and, the screws d being loosened, the chamber and sliding stem O may bemoved in either direction to the desired point, and may be thenpermanently fixed at that point by again tightening the screws cl andapplying the stop-plate f2. The permanent connection ofthe stem C withthe chamber A is effected by means of the groove k1 and the stop-platesk2, which are fastened to the inner face of the chamber A, and the edgesof which enter the groove k in the periphery of the stem C.

As doors Vary in width usually by quarters of an inch, it will be seenthat the series of equidistant recesses 7c in the sliding stemsufficiently adapt the lock to such longitudinal extension as may berequired for ordinary use. If desired, of course, the number of theserecesses may be increased, and they may be placed closer together.

I claim as my invention in an extensionlock substantially such asdescribedl. The tumblers a, provided with the inwardly-projectingtongues a2, in combination with a rectangular chamber and a crookedrotating stem provided with the longitudinal slots c', substantially asand for the purpose set forth. y

2. A cylinder provided with a rectangular chamber for containing aseries of sliding tumblers and for receiving the crooked upper portionof the rotating stem, in combination with the slotted steadying-plate Dand the box E, substantially as described.

3. The sliding stem O, in combination with the box E and thesemi-cylindrical piece I1", provided with a projecting collar or crankfor operatin g the cam-shaft I and supporting the semi-cylindricalportion of the stem O in the bearing e, substantially as described.

4. The stem C, provided with the recesses lc in its periphery, incombination with the stop-plates f1 and f2, substantiallyas described.

JOHN MOORE.

Witnesses:

M. L.' ADAMS, GEO. W. MIA'rT.

